1 files changed, 86 insertions, 0 deletions
diff --git a/libddekit/ddekit/pgtab.h b/libddekit/ddekit/pgtab.h
new file mode 100644
index 00000000..8964b713
--- /dev/null
+++ b/libddekit/ddekit/pgtab.h
@@ -0,0 +1,86 @@
+/*
+ * \brief   Virtual page-table facility
+ * \author  Thomas Friebel <tf13@os.inf.tu-dresden.de>
+ * \author  Christian Helmuth <ch12@os.inf.tu-dresden.de>
+ * \date    2006-11-03
+ */
+
+#ifndef _ddekit_pgtab_h
+#define _ddekit_pgtab_h
+
+#include "ddekit/types.h"
+
+/* FIXME Region types may be defined by pgtab users. Do we really need them
+ * here? */
+enum ddekit_pgtab_type
+{
+	PTE_TYPE_OTHER, PTE_TYPE_LARGE, PTE_TYPE_UMA, PTE_TYPE_CONTIG
+};
+
+
+/**
+ * Set virtual->physical mapping for VM region
+ *
+ * \param virt      virtual start address for region
+ * \param phys      physical start address for region
+ * \param pages     number of pages in region
+ * \param type      pgtab type for region
+ */
+void ddekit_pgtab_set_region(void *virt, ddekit_addr_t phys, int pages, int type);
+
+
+/**
+ * Set virtual->physical mapping for VM region given a specific size in bytes.
+ *
+ * Internally, DDEKit manages regions with pages. However, DDEs do not need to tangle
+ * with the underlying mechanism and therefore can use this function that takes care
+ * of translating a size to an amount of pages.
+ */
+void ddekit_pgtab_set_region_with_size(void *virt, ddekit_addr_t phys, int size, int type);
+
+
+/**
+ * Clear virtual->physical mapping for VM region
+ *
+ * \param virt      virtual start address for region
+ * \param type      pgtab type for region
+ */
+void ddekit_pgtab_clear_region(void *virt, int type);
+
+/**
+ * Get physical address for virtual address
+ *
+ * \param virt     virtual address
+ *
+ * \return physical address
+ */
+ddekit_addr_t ddekit_pgtab_get_physaddr(const void *virt);
+
+/**
+ * Get virtual address for physical address
+ *
+ * \param physical  physical address
+ *
+ * \return virtual address
+ */
+ddekit_addr_t ddekit_pgtab_get_virtaddr(const ddekit_addr_t physical);
+
+/**
+ * Get type of VM region.
+ *
+ * \param virt      virtual address
+
+ * \return VM region type
+ */
+int ddekit_pgtab_get_type(const void *virt);
+
+/**
+ * Get size of VM region.
+ *
+ * \param virt      virtual address
+ *
+ * \return VM region size (in bytes)
+ */
+int ddekit_pgtab_get_size(const void *virt);
+
+#endif